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126
MORPHOLOGY AND EVOLUTION
to give an extended origin to the powerful temporal muscles. The supra-orbital crests meet across the nose as in the Chimpanzee, but they are more massive, and the conjoined upper borders give a straight outline to
FIG. 24.—Skull of the adult male GoriUa
the upper part of the face. Moreover the characters of this crest and the shape of the malar bones and jaws make the face look square-cut.
The orbital contour approaches that in Man, in